Siphon



1,6 5,4 "1 July 12,1927. (1 R HALL 3 7 I SIPHON 2 Sheets-Shed l Fig 2 N 0 ii I \0 Patented July 111927. i I

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Ap nasmn filedl'cto'ber e, 1924, Serial No. 742,028, and; inG-reat BritainOctohe'r 25,1923; i

This invention relates to siphons for draw ing off water or other: liquidfrom reservoirs or the like and discharginginto mainsor otherwise and is designed to provide'that the flow from the s'iph on'ma-y becontinuous or may be checked and restarted as required witlioht emptying the siphon or permitting air to be forced into it through the discharge end and causing an airlock therein.

Accordingto the invention a sealed tank isplaced at a convenient position at a lower level than the reservoir, with which the siphon connects and into which it discharges and to whichan air shaft is fitted extending above the level of the reservoir to permit of the escape of air and to maintain the pres sure or head of water equal to that in the reservoir. 1

The invention I will be fully described with reference to the accompanying drawings in which it is illustrated as applied to a water supply.

Fig. l is'a sectional elevation through an artificial embankment of a reservoir shows ing the invention applied thereto.

Fig. 2 is a plan of same partly in section.

' Fig. 3 is a sectional elevation of a natural lake or reservoir showing the invention applied thereto.

Figs. 4 and 5 are enlarged details of Fig. 3.

. he invention may be applied to drawing off water from reservoirs either artificial or natural to service mains at a lower level.

In the construction shown in Figs; 1 and 2, one or more siphon pipes C are built into the wall or embankment A less than 30 feet from the base with the short leg 0 of the siphon extending inwardsinto the reservoir .A.

In the construction shown in Figs. 3 to 5,' a chamber B is erected in the reservoir A to receive the short leg 0 of the siphon C;

At any convenient position below the level of the bot-tom of the reservoir A, a sealed tank D is erected. The discharge end 0 of' the siphon G is carried down and connected to the sealed tank D so that the siphon discharges into it. ,The tank D is also fitted with an air shaft E which is carried above the highest level of the Water in the reservoir A to permit of the escape of any air entering the tank from accumulation in the mains and to maintain the pressure or head of water therein equal to the head of water in the reservoir Al ream ' To the sealeditank Dfone earners outlet. mains G. are connected through w ch the water is-drawnoif and distributed; 1

' The bot-tom of the t 111; n is at slimmest-.1155 low level that the siphon will freely discharge intoit and the outlet inaiii or, mains G enter it a higher level than thedis charge end 0 of the siphon so as always to maintain a sufficient depth of water therein to seal the discharge end of the siphon and prevent air entering it and cause an air lock.

The sealed tank D discharges through the r dischargeaperture e of the main G and valve charge can be shut off or opened at any time withoutdisturbing the working of the siphon.

A float controlled hinged inlet arm F may be attached to the inlet arm 0 of the siphon to take in the water from any level in. the

reservoir and the siphon may itself befitte'd with a suitable valve at 0 by which to ex haust it of air or charge it. with water. i

In the construction shown in Figs. 1 and I of the siphon and its floating arm but this is not essential as the siphon may be fitted direct into the reservoir-and the air shaft E g a I is preferably carried alongside of thesip'hon discharge endc though it may be placed in any other desired situation if raised to the necessary height.

This combination of siphon and sealed off the F to contain-the inletend c tank will enable reservoirs to be connected with mains without recourse .to tunnelling or boring to draw off the water through the bottom.

A similar arrangement or construction of. J

siphon maybe applied to the drawing of other liquids such as chemicals fromtanks or cisterns.

What Iclaim as my inventlon anddesire to protect by Letters Patent is I l. Siphon apparatus for drawing off water from a reservoir into supply mains comprising a siphon the short leg of which is extended into the reservoir, a sealed tank disposed at a lower level than the bottom 6 into the. mains or otherwise and the disp V of the reservoir with which the long leg of the siphon connects and into which it discharges; a draw ofl main from the sealed tankthe level of the said draw oflt main being higher than the level of the discharge end of said long leg of the siphon and a permanently openair shaft fitted to the top of the sealed tank and extending above the water level of the reservoir to permit of the escape of air and'maintain a pressure or I head in the tank equal to that in the reservoir.

' 2. In siphon apparatus for drawing ofi' water from a reservoir the combination with the wall of the reservoir or siphon discharge higher level than the mouths of the discharge legs of the siphons, aperinanently open air shaft fitted to the top of the tank 7 and extending above the water level ofthe reservoir andvalves in the draw off'mains whereby the discharge from the sealed tank may be'regulated.

In testimony whereof I have hereunto set i? my hand.

C; RUSSELL HALL. 

